CN110012390A - Listen to the low frequency sound field in environment - Google Patents
Listen to the low frequency sound field in environment Download PDFInfo
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- CN110012390A CN110012390A CN201910008433.4A CN201910008433A CN110012390A CN 110012390 A CN110012390 A CN 110012390A CN 201910008433 A CN201910008433 A CN 201910008433A CN 110012390 A CN110012390 A CN 110012390A
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- woofer
- low frequency
- signal
- sound field
- audio system
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- 230000003321 amplification Effects 0.000 claims description 6
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- 230000002463 transducing effect Effects 0.000 claims description 3
- 238000001228 spectrum Methods 0.000 abstract description 8
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- 238000010586 diagram Methods 0.000 description 9
- 238000009826 distribution Methods 0.000 description 6
- 238000005259 measurement Methods 0.000 description 6
- 238000005457 optimization Methods 0.000 description 6
- 230000005540 biological transmission Effects 0.000 description 5
- 238000004088 simulation Methods 0.000 description 4
- 238000003860 storage Methods 0.000 description 4
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R3/00—Circuits for transducers, loudspeakers or microphones
- H04R3/04—Circuits for transducers, loudspeakers or microphones for correcting frequency response
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R3/00—Circuits for transducers, loudspeakers or microphones
- H04R3/12—Circuits for transducers, loudspeakers or microphones for distributing signals to two or more loudspeakers
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/02—Casings; Cabinets ; Supports therefor; Mountings therein
- H04R1/025—Arrangements for fixing loudspeaker transducers, e.g. in a box, furniture
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
- H04R1/22—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only
- H04R1/26—Spatial arrangements of separate transducers responsive to two or more frequency ranges
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R3/00—Circuits for transducers, loudspeakers or microphones
- H04R3/12—Circuits for transducers, loudspeakers or microphones for distributing signals to two or more loudspeakers
- H04R3/14—Cross-over networks
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04S—STEREOPHONIC SYSTEMS
- H04S7/00—Indicating arrangements; Control arrangements, e.g. balance control
- H04S7/30—Control circuits for electronic adaptation of the sound field
- H04S7/301—Automatic calibration of stereophonic sound system, e.g. with test microphone
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04S—STEREOPHONIC SYSTEMS
- H04S7/00—Indicating arrangements; Control arrangements, e.g. balance control
- H04S7/30—Control circuits for electronic adaptation of the sound field
- H04S7/307—Frequency adjustment, e.g. tone control
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2430/00—Signal processing covered by H04R, not provided for in its groups
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2499/00—Aspects covered by H04R or H04S not otherwise provided for in their subgroups
- H04R2499/10—General applications
- H04R2499/13—Acoustic transducers and sound field adaptation in vehicles
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Health & Medical Sciences (AREA)
- Otolaryngology (AREA)
- General Health & Medical Sciences (AREA)
- Stereophonic System (AREA)
- Circuit For Audible Band Transducer (AREA)
- Fittings On The Vehicle Exterior For Carrying Loads, And Devices For Holding Or Mounting Articles (AREA)
Abstract
The disclosure provides the method and system of the low frequency listening experience for homogenizing user in multiple seat positions in multiple positions, such as vehicle.Example audio system includes multiple woofers, and the woofer is configured to export low-frequency sound to listening in environment to generate uniform low frequency sound field.In this case, the uniformity of the low frequency sound field is for example that frequency spectrum is uniform in the listening space entirely extended.
Description
Technical field
Embodiments disclosed herein relates generally to the audio system with low-frequency transducer, the low-frequency transducer
For controlling the low frequency sound field listened in environment.
Background technique
Conventional truck includes listening to environment.There can be multiple seats in environment listening to, for example, pilot set, front row
Passenger seat, the first back seat, second back seat etc..Conventional truck can also include having the audio system of woofer
System.Single woofer can be responsible for exporting some or all low-frequency sounds to listening in environment.Since single low frequency is raised
Sound device, listening to the low frequency sound field in environment will substantially change between seat.Therefore, the low frequency listening experience of passenger will be according to seat
Chair selects and significant change.
Summary of the invention
The disclosure provides the low frequency for homogenizing user in multiple seat positions in multiple positions, such as vehicle and receives
Listen the method and system of experience.Example audio system includes multiple woofers, and the woofer is configured to will be low
Frequency sound is exported to listening in environment, in specified listening area (for example, region of estimation and/or measurement acoustic transfer function)
It is middle to generate uniform low frequency sound field.The example audio system can also include multiple filters, in the multiple woofer
Each woofer have in the multiple filter and distribute to the respective filter of the woofer, to generate
State uniform low frequency sound field.In this case, the uniformity of the low frequency sound field is frequency spectrum for example in the listening area of extension
Uniformly.
As described herein, resulting uniform sound field is the knot of sound field indicators filter (for example, being applied to woofer)
Fruit, the sound field indicators filter is based on from each individual woofers to the space for limiting controlled listening area of interest
In the acoustic transfer function of each point calculate.Filter can be determined based on constrained optimization, wherein specified cost letter
Number is realized to setting the goal or object set is (for example, have such as uniformity, the control speaker operation or power for realizing target
Deng the lowest mean square for limiting various constraints).When each respective filter is applied to each corresponding woofer, gained
Combined full sound field ideally realize target, and therefore generate uniform low frequency sound field in space listening area of interest.Cause
This, calculates the filter and the filter is applied to the corresponding woofer, to control the low frequency loudspeaker
The resulting combined full sound field of device.
The instance method for generating uniform low frequency sound field for multiple woofers by audio system includes: to pass through institute
The target low frequency sound field performance of the uniform low frequency sound field is arranged in the processor for stating audio system；Institute is limited by the processor
State the listening area of uniform low frequency sound field；And it is described equal to export by the multiple woofer of processor selection
Even low frequency sound field, each woofer in the multiple woofer have relative to the ring including the listening area
The specified corresponding position in border.The instance method can also include: by the processor calculating can be formed it is described uniformly it is low
The filter of frequency sound field；One or more filters are applied to be supplied to the low frequency signal of the multiple woofer, institute
One or more filters are stated to be tuned based on prediction or the uniform low frequency sound field of target；And pass through the multiple bass loudspeaker
Device exports individual contributions to the sound field, and individual contributions form the uniform low frequency sound field by superposition.
Performance can be achieved in the totality of low frequency sound field and therefore uniformity will be opposite depending on the multiple woofer
Space diversity in the position of the listening area of desired uniformity.For example, the reduced space of the multiple woofer point
Collection, which will reduce, can be achieved uniformity.In order to characterize the sound field in listening area, initial setting up may include estimation or measure from every
Acoustic transfer function of individual loudspeakers to the difference in the space listened in environment.The estimation of acoustic transfer function and/
Or measurement may include executing simulation (for example, using the estimation or measurement of the geometry for listening to environment, and/or about similar
The past data of environment) and/or measure using microphone/microphone array sound transmission in environment.
Example audio system for vehicle includes: multiple woofers；One or more non-bass loudspeaker transducings
Device；Low frequency frequency divider；And controller, the controller are configured to receive the target component of uniform low frequency sound field；Limit institute
State the listening area of the uniform low frequency sound field in vehicle；And it based on the target component received and described is limited
Listening area calculates the uniform low frequency sound field.The controller can be configured to: receive audio signal from audio-source；
The audio signal is guided to the low frequency frequency divider, the low frequency frequency divider is configured to for the audio signal being divided into pair
First signal of the first frequency range of audio signal described in Ying Yu and second frequency range corresponding to the audio signal
Second signal, the first frequency range is lower than the second frequency range, and first signal is guided to described more
Each woofer in a woofer and guide the second signal to one or more of non-bass is raised
At least one energy converter in sound device energy converter.The controller can be configured to will be corresponding for each woofer
Filter is applied to first signal to generate corresponding filtering signal, and the corresponding filtering signal is based on described calculated equal
Even low frequency sound field is tuned；And it is described equal to generate by each corresponding filtering signal of the multiple woofer output
Even low frequency sound field.
Detailed description of the invention
Fig. 1 shows the schematic diagram of the vehicle according to one or more embodiments.
Fig. 2 shows the schematic diagrames according to the audio systems of one or more embodiments.
Fig. 3 shows the flow chart of typical workflow when being depicted in optimization low frequency sound field.
Fig. 4 shows the schematic diagram of the vehicle according to one or more embodiments, including surrounds each head of passenger position
Listening area and a series of seat positions of covering wider listening area.
Fig. 5 is shown again such as the wider listening area in Fig. 4, but seat position can more flexible and passenger do not drive
Under the automatic driving vehicle or similar situation of the task of vehicle.
The example that Fig. 6 shows the response of the audio system in each region, the region indicate to be made when low frequency sound field by control
Each position each head of passenger position as shown in Figure 4 when realizing similar pressure response.
Fig. 7 shows the acoustic pressure calculated in entire wider listening area shown in Fig. 4 of controlled low frequency sound field in for Fig. 6
The associated standard deviation of grade.
Fig. 8 shows the poor surface chart at 150Hz for the sound pressure level as unit of dB relative to average sound pressure level, institute
Average sound pressure level is stated to listen to through for entirely wider shown in Fig. 4 also by Fig. 6 and Fig. 7 controlled low frequency sound field described
Region calculates.
Fig. 9 shows the schematic diagram of vehicle, wherein only single woofer or subwoofer work, and including
Around the listening area of each head of passenger position and a series of wider listening area of seat positions of covering.
Figure 10 shows the response of the gained sound pressure level in each region, and the region indicates ought only single woofer or again
Each head of passenger position as shown in Figure 9 when woofer works in typical vehicle.
Figure 11 shows institute in Fig. 9 when only single woofer or subwoofer work in typical vehicle
Show the gained standard deviation of the sound pressure level calculated in entire wider listening area.
Figure 12 shows the poor surface chart at 150Hz for the sound pressure level as unit of dB relative to average sound pressure level,
Average sound pressure level institute in Fig. 9 in typical vehicle when only single woofer or subwoofer work
Show that entire wider listening area calculates.
The embodiment that Figure 13 shows the disclosure for larger compartment.
Figure 14 shows the unlimited baffle response of woofer, and medium and low spectrum loudspeaker is deployed in as shown in Figure 13 at it
There is sealing rear shell when in disclosure embodiment.
Figure 15 shows each of five woofers for disposing in disclosure embodiment as shown in Figure 13
The control filter amplitude of woofer responds.
Specific embodiment
Detailed embodiment is disclosed herein；However, it should be understood that disclosed embodiment is only that can pass through various substitutions
The example for the disclosed feature that form is implemented.The drawings are not necessarily drawn to scale；Some features may be exaggerated or minimized with
The details of particular elements is shown.Therefore, specific structural and functional details disclosed herein is not necessarily to be construed as restrictive, and
As just representative basis.
As used herein, the spatial character of the gained sound field reproduced by audio system may refer to how to be closed limiting
Measurement or perceptual signal on the limited space region of the listened position of note.Uniform low frequency sound field can be defined as in target area
There is low spatial deviation, with target relevant to frequency spectrum and time detail and as will be described between interior listened position
The target realized on entire extraterrestrial target region.The spectral characteristic of gained sound field may refer to due to control frequency pulse response
(for example, global refer to tuned filter, the tuned filter is for all low frequencies for the global tuning of filter and audio system
Loudspeaker/woofer channel shares, so if global filtering device has reasonable property, then will not influence sound field indicators electricity
Position) and in space set point measurement or perceive the voice signal of (related to the tone color of audio system) (for example, frequency
Response) spectral density.Uniform frequency spectrum resolution ratio can refer to that spectral flatness responds, or according to aim curve (for example, non-flat forms are bent
Line) spectrum distribution.Time response can refer to the time response (for example, impulse response) of the system measured, and can be with
The perception of drying, rumble in bass Sound reproducing etc. is related.According to the disclosure, can will be responded according to the object time or ring
Front/rear forming introduces audio system.
Fig. 1 shows the schematic diagram of the vehicle 100 according to one or more embodiments.Vehicle includes listening to ring in vehicle
Border or space 101.It is listening in environment 101, vehicle includes multiple seats.Multiple seats include at least the first seat 102 and the
Two seats 103.Other than the first seat 102 and the second seat 103, multiple seats can also include booster seat, for example, the
Three seats 104 and the 4th seat 105.
In vehicle 100, the first seat 102 can be left front FL seat.It is left when vehicle 100 is left handle drive vehicle
Preceding FL seat can be pilot set.Second seat 103 can be FR seat before the right side adjacent with the first seat 102.Work as vehicle
100 when being left handle drive vehicle, it is right before FR seat can be front passenger seat.First seat 102 and the second seat 103 can
To be located in the first row of vehicle 100.Third seat 104 can be the left back RL seat positioned at 102 rear of the first seat.4th
Seat 105 can be the RR seat behind 103 rear of the second seat and the right side adjacent with third seat 104.104 He of third seat
4th seat 105 can be located in the second row of vehicle 100.
Vehicle may include the audio system 106 for listening to environment 101.Audio system 106 may include multiple basses
Loudspeaker.Multiple woofers may include that the first woofer 107, the second woofer 108 and third bass are raised
Sound device 109.It is multiple low other than the first woofer 107, the second woofer 108 and third woofer 109
Sound loudspeaker can also include additional woofer, for example, the 4th woofer 110 and the 5th woofer 111.
First woofer 107 and the second woofer 108 can be located in the first row of vehicle 100.First
In row, the first woofer 107 can be close to the first seat 102 and far from the second seat 103, and the second woofer
108 can be close to the second seat 103 and far from the first seat 102.
First woofer 107 can be located in the left front door of vehicle 100.Alternatively, the first woofer 107 can be with
In another region on the left of the center line CL of vehicle 100.First woofer 107 is located in another outside left front door
The low frequency listening experience of passenger can be improved in region, because otherwise this can be reduced may put in the first woofer 107
The undesirable structural vibration occurred when being placed in left front door.As the example being placed in another region, when vehicle 100 includes
In the centre gangway being aligned on center line CL, it is left that the first woofer 107 can be located at center line CL in centre gangway
Side.As another example, the first woofer 107 can be located in the firewall of vehicle 100, wherein first bass is raised
Sound device is centrally disposed on the left of line CL.As another example, the first woofer 107 can be located at 102 lower section of the first seat.
Sound field indicators current potential and woofer be laid out in space diversity and/or scattering it is related.For example, positioning or assembling against each other
Woofer together can reduce the current potential for generating uniform low frequency sound field.
Second woofer 108 can be located in the right front door of vehicle 100.Alternatively, the second woofer 108 can be with
In another region on the right side of the center line CL of vehicle 100.It is similar with the first woofer 107, it for similar reasons, will
The low frequency listening experience of passenger can be improved in another region outside second woofer 108 positioning right front door.As placement
Example in another region, when vehicle 100 includes the centre gangway being aligned on center line CL, the second woofer
108 can be located on the right side of center line CL in centre gangway.As another example, the second woofer 108 can be located at vehicle
In 100 firewall, wherein second woofer is centrally disposed on the right side of line CL.As another example, second is low
Sound loudspeaker 108 can be located at 103 lower section of the second seat.
The center line CL of vehicle 100 may be used as the mirror image of the first woofer 107 and the second woofer 108
Line.Therefore, the first woofer 107 can pass through 108 mirror image of center line CL and the second woofer.Therefore, first is low
The orientation of sound loudspeaker 107 can pass through the orientation mirror image of center line CL and the second woofer 108.
In the car, third woofer 109 can be located at the rear portion of vehicle 100, so that third woofer leans on
The rear portion of nearly vehicle 100 and the front of separate vehicle 100.For example, when vehicle 100 includes boot, third woofer
109 can be located in boot.As another example, when vehicle 100 includes luggage boot, third woofer 109 can
To be located in luggage boot.As another example, third woofer 109 can be located at third seat 104 and the 4th seat
105 rears, for example, being located in the rear backrest support plate of third seat 104 and the 4th seat 105.Third woofer 109 can
To be located on the center line CL of vehicle 100.
4th woofer 110 and the 5th woofer 111 can be located in the second row of vehicle 100.Second
In row, the 4th woofer 110 can be close to third seat 104 and far from the 4th seat 105, and the 5th woofer
111 can be close to the 4th seat 105 and far from third seat 104.
4th woofer 110 can be located in the left back inner wall of vehicle 100, and the left back inner wall can connect to vehicle
100 left back side plate.As another example, the 4th woofer 110 can be located in the left back door of vehicle 100.As
Another example, the 4th woofer 110 can be located at 104 lower section of third seat.As another example, the 4th woofer
It can be located in another region on the left of center line CL.It is similar with the first woofer 107, for similar reasons, by the 4th
Woofer 110 is located in another region outside left back door the low frequency listening experience that can improve passenger.
5th woofer 111 can be in inner wall behind the right side of vehicle 100, and inner wall can connect to vehicle behind the right side
100 right lateral side plate.As another example, the 5th woofer 111 can be located in the right-rear-door of vehicle 100.As
Another example, the 5th woofer 111 can be located at 105 lower section of the 4th seat.As another example, the 5th woofer
It can be located in another region on the right side of center line CL.It is similar with the first woofer 107, for similar reasons, by the 5th
Woofer 111 is located in another region outside right-rear-door the low frequency listening experience that can improve passenger.
The center line CL of vehicle 100 is also used as the mirror image of the 4th woofer 110 and the 5th woofer 111
Line.Therefore, the 4th woofer 110 can pass through 111 mirror image of center line CL and the 5th woofer.Therefore, the 4th is low
The orientation of sound loudspeaker 110 can pass through the orientation mirror image of center line CL and the 5th woofer 111.
First woofer 107, the second woofer 108, third woofer 109, the 4th woofer
110 and the 5th any additional woofer in woofer 111 and multiple woofers can have identical product
Board, model, size and therefore parameters,acoustics such as frequency response having the same, and advantageously there is overlapping feature.It is multiple low
Each woofer in sound loudspeaker can will be from 20Hz to 200Hz (by the low frequency of the general sound of audio system output
Range section) low-frequency sound export to listening to environment 101.In audio system 106, each of multiple woofers are low
Sound loudspeaker can be assigned the filter of its own.For example, in audio system 106, it can be by the first finite impulse response (FIR)
FIR filter distributes to the first woofer 107, and it is low the second finite pulse response FIR filter can be distributed to second
Third finite pulse response FIR filter can be distributed to third woofer 109 by sound loudspeaker 108, can be by the 4th
Finite pulse response FIR filter distributes to the 4th woofer 110, and the 5th finite pulse response FIR can be filtered
Wave device distributes to the 5th woofer 111.
Generally, audio system 106 can operate in the frequency range of 20Hz to 20KHz.For this purpose, audio system 106
It may include multiple non-bass speaker transducers, for example, mid frequency transducer and high-frequency transducer are (for example, to export by audio
The low frequency of the general sound of system output and intermediate frequency range part, wherein general sound output includes the non-bass by audio system
The low frequency of speaker transducer output and intermediate frequency range part, and the low-frequency range exported by the woofer of audio system
Part).Audio system may include low frequency frequency divider.At low frequency frequency divider, there may be the operation from woofer to
The seamless transitions of the operation of mid frequency transducer.
For example, low frequency frequency divider may be configured to that audio signal will be entered and be divided into multiple frequency ranges (for example, at least the
One frequency range and second frequency range).Signal corresponding to the first frequency range for entering audio signal can be directed to
Multiple woofers in audio system 106, and the signal corresponded into the second frequency range of audio signal can be with
At least one energy converter being directed in one or more intermediate frequencies and high-frequency transducer.Low frequency frequency divider can be set multiple
In the opereating specification of woofer (that is, at 20Hz to the point between 200Hz).Use above example, first frequency range
It may be in the opereating specification of multiple woofers, and second frequency range may be at multiple non-bass loudspeakers and change
In the opereating specification of at least one energy converter in energy device (for example, mid frequency transducer).Low frequency frequency divider and/or another frequency divider
Circuit, which may be configured to further split, enters audio signal, and will correspond to the third frequency range for entering audio signal
Signal guide another or multiple energy converters into multiple non-bass speaker transducers (for example, high-frequency transducer).With
This mode, one or more frequency dividers can be used for splitting into audio, and based on the opereating specification of energy converter by different frequencies
Rate range into audio-guided to associated transducers.
Audio system 106 may include user interface.User interface can be display.Display can be touch screen display
Show device.Display can be located in the central control panel of vehicle 100.Additionally or alternatively, user interface may include input hardware
Element, such as input switch.User interface can be electrically connected to the controller of audio system 106.The controller may include
Digital signal processor DSP, the graphics processing unit GPU, system on chip SOC solved with static or adaptive algorithm, and/or
Another Integrated circuit IC.For example, controller may include frequency pulse response (FIR) control filter and/or adaptive algorithm
Control, adaptive algorithm control is according to by listening space (for example, environmental condition) or external energy converter quantization
Input and/or parameter come change or recalculate FIR control filter.Controller can be electrically connected to the tune of audio system 106
Humorous device, for example, AM tuner or FM tuner.Controller can be electrically connected to the satelline radio antenna of audio system 106.Control
Device processed can be electrically connected to the wireless antenna of audio system 106, for example, Bluetooth antenna, Wi-Fi antenna or Wi-Fi direct antenna.
In audio system 106, controller can be electrically connected to cellular antenna, Telematics control units TCU and/or GPS days
Line.Controller can be electrically connected to the memory device of audio system 106, for example, random access memory ram, read-only storage
Device ROM, electric programmable read-only memory EPROM, electricallyerasable ROM (EEROM) EEROM, FLASH, hard disk drive HDD, and/
Or solid state drive SDD.Software can store in memory device, and can be accessed and be executed by controller.It distributes to low
The filter of sound loudspeaker can store in memory device.Controller can be electrically connected to one of audio system 106 or
Multiple input ports, one or more output ports, and/or the one or more port input/output I/O.Such as smart phone
Mancarried device can pass through the port one or more input/output I/O, input port and/or wireless antenna and audio system
System communication.Audio system 106 can be electrically connected to power supply, such as DC battery.Controller can be electrically connected in audio system 106
One or more microphones.Audio system 106 may include loudspeaker.Loudspeaker can be electrically connected to controller.Audio system
System 106 may include analog-digital converter ADC, digital-to-analogue DAC, the additional filter in software, physical hardware filter, additional audio
Component and/or additional hardware components.
In vehicle 100, with multiple woofers and suitable filter listen to environment 101 can produce it is uniformly low
Frequency sound field.In uniform low frequency sound field, passenger can perceive same low frequency at each seat in multiple seats and listen to body
It tests.Therefore, if passenger is moved to the 4th seat 105 from the first seat 102, passenger can perceive at the 4th seat 105
To with identical low frequency listening experience in the first seat 102.It can be desired use by the consistent perception of uniform low frequency sound field
Family experience, for example, for the default low frequency listening experience of audio system 106.May want to passenger can choose any seat, and
Without considering whether seat than another seat has more preferably low frequency listening experience.Therefore, because uniformity, low frequency is listened to
Experience is substantially optimized (for example, listening in environment 101 at each seat in multiple seats in environment 101 listening to
The loudness of audio output can listen to substantially the same at each seat in multiple seats in environment, therefore listen to ring
The loudness of audio output in border can not change in listening to environment).
In vehicle 100, multiple woofers and the filter for distributing to it can produce uniform low frequency sound field.This
It may be arrangement due to multiple woofers in vehicle 100 and for the filter for distributing to multiple woofers
The value of setting.In order to form uniform sound field, it may be necessary at least the first woofer 107, the second woofer 108 and
Three woofers 109.Furthermore, it may be desired to the 4th woofer 110 and the 5th woofer 111.Furthermore, it is possible to need
Want the first finite pulse response FIR filter, the second finite pulse response FIR filter and the filter of third finite pulse response FIR
Wave device forms uniform sound field.In addition, in vehicle 100, it, can when including the 4th woofer and five woofers
The 4th finite pulse response FIR filter and the 5th finite pulse response FIR filter can be needed to form uniform sound field.
In audio system 106, controller can receive source signal from audio-source.Audio-source can be audio system 106
A part, for example, being stored in the audio file in the memory device of audio system 106.Alternatively, audio-source can be in audio
The outside of system 106 but communicate with audio system 106, for example, communicated by wireless antenna with audio system and with due to
Audio system communicates and the mancarried device of audio file that can play on an audio system.Source signal can be digital source letter
Number or simulation source signal.When source signal is simulation source signal, simulation source signal can be converted into number by analog-digital converter ADC
Source signal.It can occur before reaching controller from the conversion of analog to digital or occur in controller itself.Work as control
When including analog-digital converter in device, the conversion from analog to digital can occur in controller itself.
Controller can analyze and adjust source signal.As analysis and a part adjusted, controller can believe bass
Number with the one or more for example for another loudspeaker in stereo left, the stereo right side, center loudspeaker, multi-channel system
Other frequency signal separation.Bass signal can be monophonic signal.Monophonic signal can be to be combined with stereo right signal
Stereo left signal.Monophonic signal can belong to a certain frequency range, for example, the low frequency model from 20Hz to 200Hz
It encloses.
Controller can send bass signal along the signal path of each woofer in multiple woofers
(for example, low frequency signal).Each signal path includes the filter of its own.In the signal path, filter can be distribution
To the finite pulse response FIR filter of the specific woofer in multiple woofers.The finite impulse of signal path
Response FIR filter can be filtered common bass signal.Filtering bass signal can be sent to digital analog converter
DAC.Filtering bass signal can be converted into simulating from number.Analog filtering bass signal can amplify in loudspeaker.Amplification
Analog filtering bass signal can drive the specific woofer in multiple woofers.For this purpose, specific bass loudspeaker
Device can export low-frequency sound to listening in environment 101.
The one or more signals for the other parts for covering audible spectrum can be sent to multiple non-bass and raised by controller
One or more energy converters in sound device energy converter.Different from bass signal, one or more of the other frequency signal can be suitble to
In providing suitable audio experience by reproducing entire audible audible spectrum.Therefore, different from multiple woofers, from control
The signal that device processed is sent to multiple non-bass speaker transducers can not be identical.For example, if multiple non-bass loudspeakers change
Energy device setting is used for 5.1 multitrack surround sounds, then other than bass signal, controller can send out left front signal, center
Signal, front signal, a left side are around signal and right surround signal.Left front signal can be sent to for non-bass speaker transducer
The first subset one or more signal paths, center signal can be sent to second for non-bass speaker transducer
One or more signal paths of subset, front signal can be sent to the third subset for non-bass speaker transducer
One or more signal paths, left one or more around the 4th subset that can be sent to for non-bass speaker transducer
A signal path and right surround can be sent to one or more letters of the 5th subset for non-bass speaker transducer
Number.Each subset of non-bass speaker transducer can be mutually exclusive or independent of one another.Non-bass speaker transducer it is every
A signal path may include filter, time delay, digital analog converter DAC and loudspeaker.
As another example, non-bass speaker transducer may be at stereo setting.In stereo setting, in addition to
Except uniform bass signal, controller can send out stereo left signal and stereo right signal.Stereo left signal can be with
One or more signal paths of the first subset for non-bass speaker transducer are sent to, and stereo right signal can
To be sent to one or more signal paths of the second subset for non-bass speaker transducer.Non-bass loudspeaker transducing
Each subset of device equally can be mutually exclusive or independent of one another.For non-bass speaker transducer, 5.1 multitrack surround sounds
It is also possible for being arranged with other settings except stereo setting.In vehicle 100 audio system (e.g., including bass is raised
Sound device 107 to 111) uniform low frequency sound field, intermediate frequency sound field and/or high frequency sound field can be provided.
Fig. 2 shows be used to export sound to the audio system listened in environment according to one or more embodiments
200 schematic diagram.Listening to environment can be the compartment of vehicle.Audio system 200 may include multiple woofers 201.It is more
A woofer 201 may include N+1 woofer, wherein N >=1.Test shows to listen in environment certain, can
Three woofers can be needed, to form uniform low frequency sound field.It may occur when there is packaging and cost limitation this
Situation.Test shows to listen in environment other, it may be necessary to five woofers, to form uniform low frequency sound field.But
It is to be listened in environment other, it may be necessary to more or less woofers, to form uniform low frequency sound field.In fact,
The number of woofer will determine by required target low frequency sound field performance, for example, the required bandwidth of uniformity and it is other because
Element, for example, compartment geometry and need uniformity listening area range.
Audio system 200 may include multiple non-bass speaker transducers 202.Although diagram two, can deposit
Additional non-bass speaker transducer in multiple non-bass speaker transducers 202.The product of non-bass speaker transducer
Board, model, size and parameters,acoustic can be different from each other.Additionally or alternatively, the one of multiple non-bass speaker transducers 202
A or multiple subsets can have same brand, model, size and parameters,acoustic.
Audio system may include controller 203.Controller 203 can receive source signal 204 from audio-source.Controller
204 can analyze and adjust source signal 204.As analysis and a part adjusted, controller can be by bass signal 205 and the
One frequency signal 206 and second frequency signal 207 separate, for example, in supreme stereo left signal and in the supreme stereo right side
Signal separator.Other than bass signal 205, although referring to two frequency signals 206,207, there may be in addition to two
Extra frequency signal except frequency signal.It, can there is only a frequencies to believe alternatively, instead of two frequency signals 206,207
Number.Therefore, first frequency signal 206 can be identical or different with second frequency signal 207.
Each signal path of multiple woofers 201 can receive identical bass signal 205 from controller 204.It is more
Each signal path of a woofer may include the filter block 208 of its own.Each filter block 208 may include
Filter.In each filter block 208, filter can be finite pulse response FIR filter.Each FIR filter
Value can be different from each other.Alternatively, two or more FIR filters can have identical value setting.It therefore, can be according to filter
Filter of the wave device block in its corresponding signal path is filtered bass signal 205.Therefore, when filter is that have each other
When the FIR filter of different values, filtering bass signal will be different from each other.
Each filter block 208 may include digital analog converter DAC and loudspeaker.The filtering bass in corresponding signal path is believed
It number can be converted into simulating from number by digital analog converter DAC, then pass through loudspeaker amplification.The analog filtering of each amplification
Bass signal 209,210,211 can be supplied to its corresponding woofer in multiple woofers 201.Each amplification
Analog filtering bass signal 209,210,211 can be different from each other.Alternatively, the analog filtering bass letter of one or more amplifications
Numbers 209,210,211 can be identical.In response, each woofer in multiple woofers 201 can be correspondingly
Low-frequency sound is exported to listening in environment.
Multiple woofers 201 in listening to environment or around distribution and orientation can by passive device without
Additional filtering generates suitably homogenous low frequency sound field.Sometimes, the distribution of multiple woofers 201 and orientation and filter block 208
In the combination of filter uniform low frequency sound field may be implemented.In these cases, the filter in filter block can carry out
Tuning, to realize uniform low frequency sound field.
First audio signal can pass through the first adjusting block 212 from controller 203.First adjusting block may include filtering
Device, converter, loudspeaker or another Signal Regulation element.First audio signal is adjusted from the first adjusting block, directly to pass
Its corresponding non-bass speaker transducer being delivered in multiple non-bass speaker transducers 202.In response, corresponding non-bass
Speaker transducer by to high-frequency sound export to listen in environment (for example, than woofer output sound higher frequency
Sound).Similarly, the second audio signal can pass through the second adjusting block 213 from controller 203.Second adjusting block can wrap
Include filter, converter, loudspeaker or another Signal Regulation element.Second audio signal is adjusted from the second adjusting block, with
Its corresponding non-bass speaker transducer being directly delivered in multiple non-bass speaker transducers 202.In response, accordingly
Non-bass speaker transducer is exported to high-frequency sound to listening in environment by.
Fig. 3 shows the flow chart of typical workflow when being depicted in optimization low frequency sound field.Step in flow chart is permissible
It manually or as needed more or less automates, and the step in workflow can follow different order.Most
Just, required target low frequency sound field feature is specified at 301.It includes the one or more ginsengs for describing required low frequency sound field that this is specified
Number, one or more of parameters can be but not limited to the required bandwidth of low-frequency sound, such as 20Hz to 200Hz, and/or
The standard of the sound pressure level value at the discrete point in space in the low frequency sound field of the frequency range of the bandwidth of operation across needed for covering
Deviation.Listening area is limited to area of space relevant to environment 101 is listened at 302, such as 400 shown in Fig. 4.With
Multiple woofers 201 are selected at 303 afterwards and the multiple woofer may include N+1 woofer,
Wherein N >=1.For the multiple woofer, at 304 selection and vehicle 100 and its to listen to environment 101 relevant often
The position of a woofer.
Low frequency control filter can be calculated at 305 now.Calculating for filter, can at 306 access number
According to library, the database includes associated acoustic transfer function, for example, at 303 select multiple woofers with
The impulse response or frequency response for the transmission path between the discrete point in the space in restriction listening area being arranged at 302.
Discrete point can be the 3 dimension grids at the interval with (but being not limited to) 5cm.Upper limiting frequency depending on the sound field analyzed, this
Interval can be rougher.The database of transmission function can be by listening to true woofer and the true of microphone
Measurement in environment or vehicle obtains, but transmission function can also use virtual woofer and virtual microphone from listening to
It is obtained in the virtual analog model of environment or vehicle.This dummy model can be finite element model.
FIR filter (for example, filter 208 of Fig. 2) can be applied to low frequency signal (for example, signal 205 of Fig. 2),
And it is fed to multiple woofers (for example, woofer 201 of Fig. 2).It is controlled based on optimization method determination/calculating
Filter, to seek to realize defined in the cost function to setting the goal.By by transmission function from woofer convolution
Assessment (by the manual/auto alternative manner according to Fig. 3) is mathematically completed to the microphone responded with filter, and
Therefore the resulting low frequency sound field of Optimization Prediction.Optimizing routine can be based on least mean square algorithm or similar algorithm.Then, Ke Yi
Specified value is exported at frequency in the required bandwidth of low frequency sound field, such as, but not limited to, from the acoustic pressure of resulting low frequency sound field
The standard deviation of grade.
If being unsatisfactory for the standard (for example, the "No" at 307) of required low frequency sound field, multiple decisions 308 can be made
To modify the beginning condition of optimization.When meeting, calculated gained FIR filter can be exported at 309 (for example, Fig. 2
Filter 208).Data 310 can use be adapted for carrying out filter data format storage, and also 311 such as Fig. 6,
It is shown in the data presented in Fig. 7 and Fig. 8.
Fig. 4 shows the schematic diagram of the vehicle 405 according to one or more embodiments, including is respectively used to institute as shown in figure 1
The listening area around each head of passenger position 401,402,403 and 404 of seat FL, FR, RL and RR of description, and cover
A series of wider listening area 400 of seat positions is covered, the seat position may include all seat positions or seat group
Multiple subsets.Shown listening area indicates a series of nominal ear positions of passenger, the nominal height range including passenger.Listening zone
Low frequency sound field in domain is driven by multiple woofers as depicted in figure 1.
Fig. 5 shows the wider listening area 500 such as 400 in Fig. 4 again, but seat position can more flexible and passenger
The task therefore passenger for not driving vehicle can the automatic driving vehicles 501 or similar towards the direction different from direction of travel
In the case of.500 may include multiple subsets of all seat positions or seat group.Low frequency sound field in listening area passes through as schemed
Multiple woofer drivings described in 1.
Fig. 6 shows the instance graph 600 of the response of the audio system in each region, and the region is indicated when in listening area
Low frequency sound field is driven by multiple woofers as depicted in figure 1, and is controlled so that uniform sound is realized in each position
Each head of passenger position as shown in Figure 4 when pressure.
Fig. 7, which is shown, to be calculated in entire wider listening area 400 shown in Fig. 4 of controlled low frequency sound field in for Fig. 6
Figure 70 0 of the associated standard deviation of sound pressure level.In this example, 176Hz standard deviation below indicates 68% response less than 2
In the +/- 2dB of average value in normal distribution data set.
Fig. 8 shows the surface chart 800 for the difference with average sound pressure level at 150Hz, and the average sound pressure level is through use
The entire wider listening area 400 shown in the Fig. 4 for also passing through the controlled low frequency sound field that Fig. 6 and Fig. 7 is described.Gray level is shown
And deviation of the average sound pressure level in the wider listening area 400 in Fig. 4 as unit of dB, shows the deviation when sound field is controlled
It is low.
Fig. 9 shows the schematic diagram of vehicle 906, wherein only single woofer or subwoofer 905 work, and
And including be respectively used to seat FL, FR, RL, RR as depicted in figure 1 around each head of passenger position 901,902,
903,904 listening area and a series of wider listening area 900 of seat positions of covering.In this example, single bass
Loudspeaker or subwoofer 905 be placed in shown in boot corner regions.
Figure 10 shows Figure 100 0 of the response of the gained sound pressure level in each region, and the region indicates only to raise single bass
When sound device or subwoofer 905 drive the low frequency sound field in listening area in typical vehicle as depicted in figure 9
Each head of passenger position.In this example, single woofer or subwoofer 905 are placed in as shown in Figure 9
Luggage case corner regions in, and the global tuning of audio system is attempted to realize smooth frequency response in back seat.
Figure 11 is shown when only single woofer or subwoofer 905 drive the low frequency sound field in listening area
The figure of the gained standard deviation of the sound pressure level calculated in entire wider listening area 900 shown in Fig. 9 in typical vehicle
1100.In this example, single woofer or subwoofer 905 are placed in luggage case corner as shown in Figure 9
In region, and the global tuning of audio system is attempted to realize smooth frequency response in back seat.
Figure 12 shows the surface chart 1200 for the difference with average sound pressure level at 150Hz, and the average sound pressure level ought be only
Single woofer or subwoofer 905 run through typical motion type multipurpose when driving the low frequency sound field in listening area
Wider listening area 900 shown in Fig. 9 in vehicle (SUV).For example, the audience in back seat region can be than in front chair region
The considerably higher sound pressure level of listener experiences, such as at 150Hz, right 904 position of back seat region in Fig. 9, audience's ratio
Higher sound pressure level is shown in the identification of other seat bodies, specifically, than the 901 high sound pressure level 12dB of left front seat region in Fig. 9.
In this example, single woofer or subwoofer 905 are placed in boot corner regions shown in Fig. 9.
Gray level show and Fig. 9 in wider listening area 900 in average sound pressure level the deviation as unit of dB.
Figure 13 shows the embodiment for larger compartment 130, such as, but not limited to the example embodiment party in SUV type compartment
Case.Listening area 131 covers required listening area and may include three rows of seats.Example implementation includes five identical
Woofer 132,133,134,135 and 136, wherein before woofer 132 and 133 be located at the on opposite sides of vehicle
Below A-pillar region domain.Two woofers 134 and 135 are located on the opposite side of vehicle, for example, being located among carriage area
In the decorative panel of back door.5th woofer 136 is located on the side of trunk region with the height for being higher than boot floor.
In an illustrative example, the woofer in this embodiment can have the chassis diameter and 154cm of 170mm2
Swept area.The acoustic radiating region (front side) of all woofers is radiated in the passenger area in compartment.Implement herein
In scheme, it is seen that woofer spatial distribution is in compartment.There are five woofers 132,133,134,135 and 136 for institute
It is respectively mounted in 12 liters of seal casinghousings, so that the passenger area of rear sound radiation and compartment on rear side of woofer film
Isolation, and furthermore substantially reduce low frequency audio and be leaked to outside vehicle.
Figure 14 shows one of the embodiment shown in Figure 13 when woofer has 12 liters of sealing rear shells
Figure 140 0 of the unlimited baffle response of woofer.The volume of shell can be filled out advantageously with suitable acoustic damping material
It fills.In this embodiment, unlimited baffle response shown in Figure 14 as second order high pass function can pass through Q factor 0.9
It is described with the resonance frequency of 80Hz.
Figure 15 shows each of five woofers for disposing in disclosure embodiment as shown in Figure 13
Woofer, Figure 150 0 of control 208 amplitude-frequency response of filter in Fig. 2.Legend refers to that bass described in Figure 13 is raised
Sound device position, wherein left front bass loudspeaker FLW is 132, and right front bass loudspeaker is 133, and left back woofer RLW is
134, right rear bass loudspeaker RRW is 135, and left boot woofer TLW is 136.Filter is controlled in example reality
The implementation applied in scheme will generate the uniform low frequency sound field as described in Fig. 6, Fig. 7 and Fig. 8.
The description to embodiment has been presented for the purpose of illustration and description.The suitable modifications and variation of embodiment
It can execute or can be obtained from method of practicing in view of above description.For example, unless otherwise specified, one or more retouched
The method of stating can be executed by the combination of appropriate device and/or device, for example, passing through the controller 203 and loudspeaker 201/ of Fig. 2
202 execute.The method can be by combining such as storage device with one or more logic devices (for example, processor), depositing
One or more additional hardware elements execution of reservoir, hardware network interface/antenna, switch, actuator, clock circuit etc. is deposited
Storage instruction is to execute.Described method and associated action can also be according to other than order described herein
Various order concurrently and/or are performed simultaneously.Described system is exemplary in itself, and may include additional element
And/or omit element.The theme of the disclosure includes disclosed various systems and configuration and other feature, function and/or spy
Property all novel and unconspicuous combination and sub-portfolios.
As used in this application, the element or step for describing and being started with word "a" or "an" in the singular
It should be understood to be not excluded for multiple element or steps, unless illustrating such exclusion.In addition, to " a reality for the disclosure
Apply scheme " or the reference of " example " be not intended to be construed to exclude to deposit also in relation with the Additional embodiments of institute's narrating characteristic
?.Term " first ", " second " and " third " etc. are used only as marking, and are not intended to apply its object numerical requirements or specific
Name placement.The appended claims point out the theme for being considered novel and unconspicuous above disclosure.
Although described above is exemplary implementation scheme, these embodiments and the disclosed feature of unexpected description
All possibility forms.On the contrary, being descriptive word word and not restrictive with word in this manual, and it will be understood that not
It can be variously modified in the case where being detached from spirit and scope of the present disclosure.Furthermore it is possible to combine the embodiment party of each realization
The feature of case is to form other embodiments of the disclosure.
Claims (20)
1. a kind of audio system, the audio system include:
Multiple woofers, the multiple woofer are configured to export low-frequency sound to listening in environment；And
Multiple filters, each woofer in the multiple woofer have the multiple filtering for distributing to it
Respective filter in device, to generate uniform low frequency sound field.
2. audio system as described in claim 1, wherein in the uniform low frequency sound field, it is described listen to it is more in environment
The low frequency listening experience at each position in a position is mutually the same.
3. audio system as claimed in claim 2, wherein described listen to environment in vehicle, and wherein described environment is listened to
In the multiple position include different seats in the vehicle.
4. audio system as described in claim 1, wherein the multiple filter includes finite impulse response filter, it is described
Finite impulse response filter is tuned to realize the uniform low frequency sound field.
It further include one or more intermediate frequencies and high-frequency transducer 5. audio system as described in claim 1, it is one or more
A intermediate frequency and high-frequency transducer are configured to export the intermediate frequency and high frequency section of the general sound exported by the audio system, institute
Stating general sound includes by the intermediate frequency and high frequency section of the intermediate frequency and high-frequency transducer output and by the multiple low
The low frequency part of sound loudspeaker output.
6. audio system as claimed in claim 5 further includes low frequency frequency divider, the low frequency frequency divider is configured to enter
Audio signal is divided at least first frequency range and second frequency range, corresponding to first frequency into audio signal
The signal of rate range is directed to the multiple woofer, and corresponds to second frequency into audio signal
The signal of rate range is directed at least one intermediate frequency and high frequency transducing in one or more of intermediate frequencies and high-frequency transducer
Device.
7. audio system as described in claim 1, wherein the multiple woofer includes three woofers.
8. audio system as described in claim 1, wherein the multiple woofer includes five woofers.
9. audio system as described in claim 1, wherein described listen to environment in vehicle, and wherein the multiple bass
Loudspeaker includes the quantity of the woofer based on the seat number in the vehicle.
10. audio system as described in claim 1 further includes controller, the controller is configured to:
Source signal is received from audio-source,
The source signal is analyzed and adjusted to generate the source signal of adjusting, and
At least part of the source signal of the adjusting is transmitted to the multiple woofer, the controller and described more
Each signal path between a woofer receives identical bass signal.
11. audio system as claimed in claim 10, wherein each of the controller and the multiple woofer
Each signal path between woofer includes respective filter block, and each filter block includes in the multiple filter
Respective filter, the respective filter is configured to the bass signal transmitted on the associated signal path
It is filtered, to generate filtered uniform bass signal.
12. audio system as claimed in claim 11, wherein the respective filter in each filter block be arranged to
The other filters of each of each other filter blocks are unrelated.
13. audio system as claimed in claim 11, wherein each filter block includes digital analog converter and loudspeaker, each
The filtered uniform bass signal of signal path is converted by the corresponding digital analog converter of the signal path, then logical
The respective loudspeaker amplification of the signal path is crossed, the corresponding woofer for being then supplied to the signal path is to export
Low-frequency sound, to form the uniform low frequency sound field.
14. a kind of method that multiple woofers for by audio system generate uniform low frequency sound field, the method packet
It includes:
The feature of the target low frequency sound field performance of the uniform low frequency sound field is set by the processor of the audio system；
The listening area of the uniform low frequency sound field is limited by the processor；
Select the multiple woofer to export the uniform low frequency sound field by the processor, the multiple bass is raised
Each woofer in sound device has the corresponding position specified relative to the environment for including the listening area；
One or more filters for realizing the uniform low frequency sound field are calculated by the processor；
By one or more of filters be applied to supplied to the multiple woofer low frequency signal, it is one or
The feature of the target low frequency sound field performance of multiple filters based on the uniform low frequency sound field is tuned；And
The uniform low frequency sound field is exported by the multiple woofer.
15. method as claimed in claim 14, wherein in response to the received user of user interface by the audio system
The target low frequency sound field performance is arranged in input, and one or more targets of the uniform low frequency sound field are specified in user's input
Parameter, one or more of target components include the target bandwidth of the uniform low frequency sound field, and/or across described in covering
The target standard deviation of the sound pressure level value at discrete point in the low frequency sound field of the discrete frequency ranges of target bandwidth.
16. method as claimed in claim 14 is inputted wherein using by the user of the user interface to the audio system
Received location information limits the listening area.
17. method as claimed in claim 14, wherein calculating for realizing the one or more of the uniform low frequency sound field
A filter include: by the processor from database retrieval in the multiple woofer and the listening area
Acoustic transfer function between different discrete points.
18. a kind of audio system for vehicle, the audio system include:
Multiple woofers；
One or more non-bass speaker transducers；
Low frequency frequency divider；And
Controller, the controller are configured to:
The target component of uniform low frequency sound field is received,
The listening area of the uniform low frequency sound field in the vehicle is limited,
It is calculated based on the target component received and the limited listening area for realizing the uniform low frequency
One or more filters of sound field,
Audio signal is received from audio-source,
The audio signal is guided to the low frequency frequency divider, the low frequency frequency divider is configured to the audio signal point
At the first signal of the first frequency range for corresponding to the audio signal, and the second frequency corresponding to the audio signal
The second signal of range, the first frequency range are lower than the second frequency range,
First signal is guided into each woofer into the multiple woofer, and described second is believed
Number at least one energy converter into one or more of non-bass speaker transducers of guidance,
For each woofer, the respective filter in one or more of filters is applied to first signal
To generate corresponding filtering signal, the respective filter is tuned based on the target component of the uniform low frequency sound field,
And
Each corresponding filtering signal is exported by the multiple woofer, to generate the uniform low frequency sound field.
19. audio system as claimed in claim 18, wherein the controller be further configured to by it is described at least one change
Energy device exports the second signal, to generate non-homogeneous intermediate frequency or high frequency sound field.
20. audio system as claimed in claim 18, wherein calculating for realizing the one of the uniform low frequency sound field
Or multiple filters include: by the controller from database retrieval the multiple woofer and the vehicle institute
State the acoustic transfer function between the different discrete points in listening area.
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|---|---|---|---|
| US201862613731P | 2018-01-04 | 2018-01-04 | |
| US62/613,731 | 2018-01-04 |
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| CN110012390A true CN110012390A (en) | 2019-07-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910008433.4A Pending CN110012390A (en) | 2018-01-04 | 2019-01-04 | Listen to the low frequency sound field in environment |
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| US (1) | US10893361B2 (en) |
| EP (1) | EP3509320A1 (en) |
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| CN114979906A (en) * | 2022-04-20 | 2022-08-30 | 中国第一汽车股份有限公司 | Speaker system of vehicle-mounted sound reproduction system and automobile |
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| FR3068309B1 (en) * | 2017-06-29 | 2019-08-23 | Faurecia Interieur Industrie | ACCOMMODATION OF AMMENAGABLE VEHICLE |
| US10817246B2 (en) * | 2018-12-28 | 2020-10-27 | Baidu Usa Llc | Deactivating a display of a smart display device based on a sound-based mechanism |
| US11395065B2 (en) * | 2019-01-07 | 2022-07-19 | Kikago Limited | Audio device, audio system, and audio processing method |
| JP2022538017A (en) * | 2019-06-20 | 2022-08-31 | ディラック、リサーチ、アクチボラグ | Bass management in audio systems |
| CN113938805B (en) * | 2020-07-14 | 2024-04-23 | 广州汽车集团股份有限公司 | Method and device for quantizing bass tone quality |
| CN112069598A (en) * | 2020-08-26 | 2020-12-11 | 广州汽车集团股份有限公司 | Method and device for determining arrangement position of loudspeaker in vehicle and vehicle |
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Also Published As
| Publication number | Publication date |
|---|---|
| EP3509320A1 (en) | 2019-07-10 |
| US10893361B2 (en) | 2021-01-12 |
| US20190208322A1 (en) | 2019-07-04 |
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